From e58ed5052bbf4a8891ddd0bccd9d1edfb6277ff8 Mon Sep 17 00:00:00 2001
From: zimbatm <zimbatm@zimbatm.com>
Date: Fri, 7 Feb 2020 21:35:51 +0100
Subject: [PATCH] nix: add NIX_BUILD_SHELL

This is useful to avoid having nix-shell evaluate nixpkgs twice.
---
 images/nix/default.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/images/nix/default.nix b/images/nix/default.nix
index 620bb3e..b5bd52a 100644
--- a/images/nix/default.nix
+++ b/images/nix/default.nix
@@ -45,6 +45,7 @@ let
       Cmd = [ "/bin/bash" ];
       Env = [
         "ENV=/etc/profile.d/nix.sh"
+        "NIX_BUILD_SHELL=/bin/bash"
         "NIX_PATH=nixpkgs=${toString <nixpkgs>}"
         "PAGER=cat"
         "PATH=/usr/bin:/bin"